Author(s)

H. Kim, C. Jang

Abstract

Effect of wave breaking on vertical diffusion coefficient H. Kim, C. Jang Department of Civil and Environmental Engineering, Kookmin University, Seoul, Korea Abstract The effect of wave breaking on vertical diffusion coefficient was described by using a 1DV numerical model with one-equation turbulence closure. The turbulent kinetic energy generated from the wave breaking was supplied at the water surface, and was diffused down into the whole water column. While the breaking-induced turbulence are diffused in the water column, the vertical diffusion coefficient was modified by the additional turbulent kinetic energy. The model was applied to five wave flow cases and three wave and current flow cases to assess the effect of the wave breaking and the current. The eddy viscosity or the vertical diffusion coefficient was obtained from a simple relationship between the eddy viscosity and the mixing length and the turbulent kinetic energy. The model results on the horizontal velocity prof

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